基于CFD/CSD时域耦合方法的多通道叶栅颤振分析

doi:10.7527/S1000-6893.2013.0176

流体力学与飞行力学

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基于CFD/CSD时域耦合方法的多通道叶栅颤振分析

全金楼, 张伟伟, 苏丹, 叶正寅

西北工业大学翼型叶栅空气动力学国家重点实验室, 陕西西安 710072

收稿日期:2012-10-23 修回日期:2013-03-18 出版日期:2013-09-25 发布日期:2013-04-11
通讯作者: 张伟伟,Tel.:029-88491342 E-mail:aeroelastic@nwpu.edu.cn E-mail:aeroelastic@nwpu.edu.cn
作者简介:全金楼男, 硕士研究生。主要研究方向: 叶轮机气动弹性力学。E-mail:quanjinlou@126.com;张伟伟男, 博士, 副教授, 博士生导师。主要研究方向: 流固耦合力学与控制。Tel: 029-88491342 E-mail: aeroelastic@nwpu.edu.cn
基金资助:
国家自然科学基金(11172237,10802063);航空科学基金(2009ZA53009)

Flutter Analysis of Turbomachinery Cascades Based on Coupled CFD/CSD Method

QUAN Jinlou, ZHANG Weiwei, SU Dan, YE Zhengyin

National Key Laboratory of Science and Technology on Aerodynamic Design and Research, Northwestern Polytechnical University, Xi'an 710072, China

Received:2012-10-23 Revised:2013-03-18 Online:2013-09-25 Published:2013-04-11
Supported by:
National Natural Science Foundation of China (11172237,10802063);Aeronautical Science Foundation of China (2009ZA53009)

摘要/Abstract

摘要：

为了对叶轮机多通道叶栅颤振进行研究分析,基于时域计算流体力学(CFD)方法,耦合简化的结构动力学方程,运用杂交的线性多步方法实现了对多通道叶栅的时域耦合颤振仿真。该耦合方法通过分析叶片的动力响应特性,获得叶栅的气动弹性稳定性特征。以标准叶栅颤振模型——STCF4(Standard Test Configuration 4)为算例,计算结果表明该耦合方法与经典非耦合方法在对失稳区域的预测结果吻合得很好,证实了该耦合方法的正确性。运用该耦合方法计算了不同通道数下的自由响应,对比发现真实的叶轮机颤振与外流机翼颤振失稳的不同之处在于叶轮机叶排颤振失稳在很大程度上是一个多模态同时失稳问题;且由于出现不稳定的分支频率和阻尼都接近,叶片的时域响应会出现典型的葫芦节型发散。

关键词: 叶轮机, 气动弹性, 耦合, 颤振, 多模态

Abstract:

The paper presents a coupled method that combines a computational fluid dynamics (CFD) solver with a simplified structural motion equation in the time domain, and makes use of a hybrid multi-step scheme to investigate multi-passage cascade coupled flutter for turbomachinery. The method obtains the aeroelastic stability characteristics of the cascade by analyzing the dynamic responses of the blades. The aeroelastic characteristics of STCF-4 (Standard Test Configuration 4) are calculated with this method. The result for forecasting the instability district agrees well with that of the traditional uncoupled method, thus validating the coupled method. The method is applied to compute the free responses of cascades of different passages, and it is found that the turbomachinery flutter is different from wing flutter. Turbomachinery flutter is in many cases multimodal instability, and because the frequencies and damping coefficients of the instability mode are very close to each other, the time domain responses of the blades will typically show divergence in a gourd style.

Key words: turbomachinery, aeroelasticity, coupling, flutter, multimode

中图分类号:

V211.47

全金楼, 张伟伟, 苏丹, 叶正寅. 基于CFD/CSD时域耦合方法的多通道叶栅颤振分析[J]. 航空学报, 2013, 34(9): 2019-2028.

QUAN Jinlou, ZHANG Weiwei, SU Dan, YE Zhengyin. Flutter Analysis of Turbomachinery Cascades Based on Coupled CFD/CSD Method[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2013, 34(9): 2019-2028.

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E-mail：hkxb@buaa.edu.cn

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主管单位：中国科学技术协会主办单位：中国航空学会北京航空航天大学

基于CFD/CSD时域耦合方法的多通道叶栅颤振分析

Flutter Analysis of Turbomachinery Cascades Based on Coupled CFD/CSD Method

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